CN111113890A

CN111113890A - High-temperature 3D printing head

Info

Publication number: CN111113890A
Application number: CN202010015964.9A
Authority: CN
Inventors: 刘伟伟
Original assignee: Zhejiang Gaomi Network Technology Co Ltd
Current assignee: Zhejiang Gaomi Network Technology Co Ltd
Priority date: 2020-01-08
Filing date: 2020-01-08
Publication date: 2020-05-08

Abstract

The invention relates to the technical field of 3D printing, in particular to a high-temperature 3D printing head, which comprises a material guide pipe, a heat dissipation assembly, a heat insulation assembly, a heating assembly and a discharge nozzle; guide tube head end fixed mounting with the printer body on communicate with feeding mechanism, radiator unit cup joints on the guide tube outer wall, thermal-insulated subassembly, heating element, discharge nozzle is connected with the guide tube order in proper order, the guide tube adopts the PTFE material, this technical scheme has solved current 3D and has beaten the problem that printer head easily blockked up, the hot melt is effectual, better assurance beat printer head's unobstructed degree, the radiating effect is good, avoid the wire rod to beat printer head internal expansion deformation and lead to blockking up, the manpower that printer head consumed has been reduced in the clearance.

Description

High-temperature 3D printing head

Technical Field

The invention relates to the technical field of 3D printing, in particular to a high-temperature 3D printing head.

Background

The 3D printer is a precise electromechanical integrated device and generally comprises an X axis, a Y axis and a Z axis which are arranged on a frame, wherein the X axis and the Y axis are arranged in an XY motion plane vertical to the Z axis and are collectively called as XY axes; 3D beats printer head and sets up on the X axle, and the Y axle is located to the X axle, and mutual independent motion between X axle, Y axle and the Z axle adjusts the interval between them through print platform, realizes 3D printer's three-dimensional printing work.

The Fused Deposition Modeling (FDM) 3D printer is characterized in that a material is conveyed to a heated printing head, the printing head heats the printing material, the material in the printing head is melted, and the melted material is extruded out of a printing nozzle through downward extrusion of a feeding mechanism to be printed. The structure of beating printer head is very big to the effect of printing, and there is technical defect in the structure of a lot of 3D printers in heat treatment at present, often appears printing the temperature unstability in printing the in-process, leads to printing out the silk and is not smooth and easy, and it is inhomogeneous to go out the silk, blocks up easily and beats printer head, prints the poor scheduling problem of precision, more serious then can lead to unable printing, need provide one kind can be better solution beat printer head jam's scheme.

Disclosure of Invention

The technical problem to be solved by the invention is to provide the high-temperature 3D printing head, the technical scheme solves the problem that the existing 3D printing head is easy to block, the hot melting effect is good, the smoothness of the printing head is better ensured, the heat dissipation effect is good, the wire is prevented from being blocked due to expansion and deformation in the printing head, and the manpower for cleaning the printing head is reduced.

In order to solve the technical problems, the invention provides the following technical scheme:

a high-temperature 3D printing head is characterized by comprising a material guide pipe, a heat dissipation assembly, a heat insulation assembly, a heating assembly and a discharge nozzle;

the head end of the guide pipe is fixedly installed on the printer body and communicated with the feeding mechanism, the heat dissipation assembly is sleeved on the outer wall of the guide pipe, the heat insulation assembly, the heating assembly and the discharge nozzle are sequentially connected with the guide pipe, and the guide pipe is made of PTFE materials.

As a preferred scheme of the high-temperature 3D printing head, the heat dissipation assembly includes a heat dissipation fin, a heat dissipation copper pipe, a heat dissipation box, an integrated heat sink, a first fan, a second fan, and an air guiding pipe; the fin is evenly the axial setting on the guide pipe outer wall, the heat dissipation copper pipe evenly encircles at the fin periphery, heat dissipation case parcel is peripheral at heat dissipation copper pipe, the incasement that dispels the heat is full of the coolant, heat dissipation copper pipe extends to the outside from the heat dissipation incasement wall, heat dissipation copper pipe end and integrated radiator fixed connection, fixed mounting has first fan and second fan on the integrated radiator, first fan sets up at integrated radiator upside, the second fan sets up at integrated radiator downside, the induced duct upper end cup joints in second fan bottom, the printing region of the directional ejection of compact nozzle below of induced duct bottom opening.

As a preferred scheme that the high temperature 3D beats printer head, be equipped with inlet and liquid outlet on the heat dissipation case.

As a preferable scheme of the high-temperature 3D printing head, the heat insulation assembly comprises a heat insulation pipe and a heat insulation shell; the upper end of the heat insulation pipe is detachably connected with the bottom of the material guide pipe, the lower end of the heat insulation pipe is detachably connected with the heating assembly, the heat insulation shell covers the heating assembly, and the heat insulation pipe and the heat insulation shell are made of heat insulation materials with poor heat conductivity.

As a preferable scheme of the high-temperature 3D printing head, the heat insulation pipe comprises a small inner diameter section, a large inner diameter section and a bearing platform; the small inner diameter section is fixed above the bearing platform, the large inner diameter section is fixed below the bearing platform, and the small inner diameter section, the large inner diameter section and the large inner diameter section are communicated.

As a preferred scheme of the high-temperature 3D printing head, the heating assembly includes a thermal melting tube, a heat conducting aluminum block, a heating hole, and a thermocouple hole; the hot melt pipe adopts the heat-resisting material that the heat conductivity is good, and the hot melt pipe is vertical to run through heat conduction aluminium pig, and hot melt pipe upper portion is connected with thermal-insulated subassembly's output detachably in proper order, and the heating hole and thermocouple hole are all seted up on heat conduction aluminium pig, and the hot melt pipe setting is hugged closely to the heating hole.

Compared with the prior art, the invention has the beneficial effects that:

the extruding machine of the printer extrudes wires into the material guide pipe through the crosshead shoe, the PTFE material of the material guide pipe belongs to a high-temperature resistant material, the softening temperature is higher than 250 ℃, and the material guide pipe has self-lubricating property, so that the resistance of consumables is smaller when the consumables pass through the material guide pipe, the feeding is more convenient, the wires are sprayed out from the material outlet nozzle after passing through the material guide pipe sequentially through the heat insulation assembly and the heating assembly, the heating assembly carries out hot melting on the wires to change the wires into fluid materials which are convenient to spray out and plasticity, the heat insulation assembly blocks heat generated by the heating assembly part, on one hand, the heat backflow to the material guide pipe is prevented, on the other hand, the heat insulation effect generated by the heating assembly is improved, meanwhile, the temperature monitoring assembly of the heating assembly measures the temperature of the wires of the heating assembly section, the heat dissipation assembly further carries out heat dissipation on the heat backflow to the material, in addition, the air outlet of the heat dissipation assembly blows air to a printing area below the discharging nozzle to accelerate the forming efficiency of the printed piece.

1. The hot melting effect is good, and the smoothness of the printing head is better ensured;

2. the heat dissipation effect is good, and the wire is prevented from being blocked due to expansion and deformation in the printing head;

3. manpower consumed for cleaning the printing head is reduced.

Drawings

FIG. 1 is a first perspective view of the present invention;

FIG. 2 is a second perspective view of the present invention;

FIG. 3 is a front view of the present invention;

FIG. 4 is a left side view of the present invention;

FIG. 5 is a partial perspective cross-sectional view taken in the direction A-A of FIG. 4;

fig. 6 is a perspective view of the heat insulation pipe according to the present invention.

The reference numbers in the figures are:

1. a material guide pipe;

2. a heat dissipating component; 2a, a heat radiating fin; 2b, a heat dissipation copper pipe; 2c, a heat dissipation box; 2d, an integrated radiator; 2e, a first fan; 2f, a second fan; 2g, an induced draft pipe;

3. an insulating assembly; 3a, a heat insulation pipe; 3a1, small inner diameter section; 3a2, large inner diameter section; 3a3, cushion cap; 3b, a heat insulation shell;

4. a heating assembly; 4a, a hot melting pipe; 4b, a heat-conducting aluminum block; 4c, heating holes; 4d, thermocouple holes; 5. and a discharge nozzle.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1 to 6, the high-temperature 3D printing head comprises a material guide pipe 1, a heat dissipation assembly 2, a heat insulation assembly 3, a heating assembly 4 and a discharge nozzle 5;

head end fixed mounting of passage 1 communicates with feeding mechanism on with the printer body, and radiator unit 2 cup joints on the outer wall of passage 1, and thermal-insulated subassembly 3, heating element 4, discharge nozzle 5 are connected with passage 1 order in proper order, and passage 1 adopts the PTFE material.

A wire is extruded into a material guide pipe 1 by an extruder of a printer through a crosshead shoe, the PTFE material of the material guide pipe 1 belongs to a high-temperature resistant material, the softening temperature is higher than 250 ℃, and the material guide pipe has self-lubricating characteristics, so that the resistance of a consumable material when the consumable material passes through the material guide pipe 1 is lower, the feeding is more convenient, the wire is sprayed out from a discharge nozzle 5 through a heat insulation component 3 and a heating component 4 in sequence by passing through the material guide pipe 1, the heating component 4 carries out hot melting on the wire to enable the wire to be changed into a fluid material, the fluid material is convenient to spray out and plasticity, the heat insulation component 3 blocks the heat generated by the heating component 4, on one hand, the heat is prevented from flowing back to the material guide pipe 1, on the other hand, the heat insulation effect generated by the heating component 4 is improved, meanwhile, the temperature monitoring component of the wire of the heating component 4, avoid making the wire rod thermal expansion deformation lead to beating the emergence of the condition such as printer head stifled, in addition, the air outlet of radiator unit 2 faces the printing area of discharging nozzle 5 below and bloies the shaping efficiency of quickening the printing.

The heat dissipation assembly 2 comprises a heat dissipation fin 2a, a heat dissipation copper pipe 2b, a heat dissipation box 2c, an integrated heat dissipater 2d, a first fan 2e, a second fan 2f and an induced air pipe 2 g; the heat dissipation fins 2a are uniformly and axially arranged on the outer wall of the guide pipe 1, the heat dissipation copper pipe 2b is uniformly surrounded on the periphery of the heat dissipation fins 2a, the heat dissipation box 2c is wrapped on the periphery of the heat dissipation copper pipe 2b, the heat dissipation box 2c is filled with a coolant, the heat dissipation copper pipe 2b extends to the outside from the inner wall of the heat dissipation box 2c, the tail end of the heat dissipation copper pipe 2b is fixedly connected with the integrated radiator 2d, the integrated radiator 2d is fixedly provided with a first fan 2e and a second fan 2f, the first fan 2e is arranged on the upper side of the integrated radiator 2d, the second fan 2f is arranged on the lower side of the integrated radiator 2d, the upper end of the air induction pipe 2g is sleeved at the bottom of the second fan 2f, and the.

The heat guide of fin 2a in with the passage 1 comes out, and the coolant messenger cooling effect in the heat dissipation case 2c is more even abundant, and heat dissipation copper pipe 2b further conducts integrated radiator 2d department to the heat in the fin 2a and concentrates the heat dissipation, and first fan 2e makes the heat on the integrated radiator 2d fully give off, and the induced air effect of second fan 2f through induced duct 2g is bloied to the printed matter of ejection of compact nozzle 5 below and is accelerated the shaping.

And a liquid inlet and a liquid outlet are formed in the heat dissipation box 2 c.

The heat dissipation box 2c is connected with the pressure pump through the liquid inlet and the liquid outlet, so that cooling liquid can be conveniently replaced and supplemented, and a flowing liquid cooling system can be formed under the action of the pressure pump, so that the heat dissipation effect is further improved.

The heat insulation assembly 3 comprises a heat insulation pipe 3a and a heat insulation shell 3 b; the upper end of the heat insulation pipe 3a is detachably connected with the bottom of the material guide pipe 1, the lower end of the heat insulation pipe 3a is detachably connected with the heating assembly 4, the heat insulation shell 3b covers the heating assembly 4, and the heat insulation pipe 3a and the heat insulation shell 3b both adopt heat insulation materials with poor heat conductivity.

The heat insulation pipe 3a is made of heat insulation materials, so that the heat in the heating assembly 4 is reduced to flow back to the direction of the material guide pipe 1, the heat insulation shell 3b is wrapped on the heating assembly 4 to further prevent the heat from flowing back, and heat insulation is performed on the heating assembly 4 to improve the hot melting effect.

The heat insulation pipe 3a comprises a small inner diameter section 3a1, a large inner diameter section 3a2 and a bearing platform 3a 3; the small inner diameter section 3a1 is fixed above the bearing platform 3a3, and the large inner diameter section 3a2 is fixed below the bearing platform 3a3, and the three are communicated with each other.

The heat insulation pipe 3a is divided into the small inner diameter section 3a1, the large inner diameter section 3a2 and the bearing platform 3a3, so that the material guide pipe 1 and the heating assembly 4 can be conveniently mounted and dismounted, the bearing platform 3a3 supports pipelines on two sides, and in addition, the change of the inner diameter further prevents the hot-melted materials from flowing back to the direction of the material guide pipe 1.

The heating component 4 comprises a hot melting pipe 4a, a heat conduction aluminum block 4b, a heating hole 4c and a thermocouple hole 4 d; the hot melt pipe 4a adopts the heat-resisting material that the heat conductivity is good, and the hot melt pipe 4a vertically runs through heat conduction aluminium block 4b, and hot melt pipe 4a upper portion is connected with heat-insulating component 3's output detachably in proper order, and heating hole 4c and thermocouple hole 4d are all seted up on heat conduction aluminium block 4b, and heating hole 4c hugs closely hot melt pipe 4a and sets up.

The staff fixes the heating pipe to in heating hole 4c in advance, fixes the thermocouple in thermocouple hole 4d, and the actual temperature in the hot melt pipe 4a can be measured accurately to the thermocouple hug closely hot melt pipe 4a, and heat conduction aluminium block 4b heat conductivity is strong, can evenly transmit the heat in the heating pipe for hot melt pipe 4a, carries out the hot melt to the wire rod in the hot melt pipe 4 a.

The working principle of the invention is as follows:

Claims

1. A high-temperature 3D printing head is characterized by comprising a material guide pipe (1), a heat dissipation assembly (2), a heat insulation assembly (3), a heating assembly (4) and a discharge nozzle (5);

the head end of the material guide pipe (1) is fixedly installed on the printer body and communicated with the feeding mechanism, the heat dissipation assembly (2) is sleeved on the outer wall of the material guide pipe (1), the heat insulation assembly (3), the heating assembly (4) and the discharge nozzle (5) are sequentially connected with the material guide pipe (1), and the material guide pipe (1) is made of PTFE materials.

2. A high-temperature 3D printing head according to claim 1, wherein the heat sink assembly (2) comprises a heat sink (2 a), a heat sink copper tube (2 b), a heat sink box (2 c), an integrated heat sink (2D), a first fan (2 e), a second fan (2 f) and an air guiding tube (2 g); the heat radiating fins (2 a) are uniformly and axially arranged on the outer wall of the material guide pipe (1), the heat radiating copper pipes (2 b) are uniformly arranged on the periphery of the heat radiating fins (2 a) in a surrounding mode, the heat radiating box (2 c) is wrapped on the periphery of the heat radiating copper pipes (2 b), the heat radiating box (2 c) is filled with coolant, the heat radiating copper pipes (2 b) extend to the outside from the inner wall of the heat radiating box (2 c), the tail ends of the heat radiating copper pipes (2 b) are fixedly connected with the integrated radiator (2 d), the integrated radiator (2 d) is fixedly provided with a first fan (2 e) and a second fan (2 f), the first fan (2 e) is arranged on the upper side of the integrated radiator (2 d), the second fan (2 f) is arranged on the lower side of the integrated radiator (2 d), the upper end of the air guide pipe (2 g) is sleeved at the bottom of the second fan (2 f), and the bottom opening of the air guide pipe.

3. A high temperature 3D print head according to claim 2, characterized in that the heat sink box (2 c) is provided with a liquid inlet and a liquid outlet.

4. A high temperature 3D print head according to claim 1, characterized in that the thermal insulation assembly (3) comprises a thermal insulation tube (3 a) and a thermal insulation housing (3 b); the upper end of the heat insulation pipe (3 a) is detachably connected with the bottom of the material guide pipe (1), the lower end of the heat insulation pipe (3 a) is detachably connected with the heating assembly (4), the heat insulation shell (3 b) covers the heating assembly (4), and the heat insulation pipe (3 a) and the heat insulation shell (3 b) both adopt heat insulation materials with poor heat conductivity.

5. A high temperature 3D printhead according to claim 4, wherein the insulating tube (3 a) comprises a small inner diameter section (3 a 1), a large inner diameter section (3 a 2) and a platform (3 a 3); the small inner diameter section (3 a 1) is fixed above the bearing platform (3 a 3), and the large inner diameter section (3 a 2) is fixed below the bearing platform (3 a 3), and the three are communicated with each other.

6. A high temperature 3D print head according to claim 1, characterized in that the heating assembly (4) comprises a heat pipe (4 a), a heat conducting aluminum block (4 b), a heating hole (4 c) and a thermocouple hole (4D); the hot melt pipe (4 a) adopts the heat-resisting material that the heat conductivity is good, and hot melt pipe (4 a) vertically runs through heat conduction aluminium block (4 b), and hot melt pipe (4 a) upper portion is connected with the output detachably of thermal-insulated subassembly (3) in proper order, and heating hole (4 c) and thermocouple hole (4 d) are all seted up on heat conduction aluminium block (4 b), and hot melt pipe (4 a) setting is hugged closely in heating hole (4 c).